Biometric refers to the use of unique physical or behavioral characteristics of an individual, such as fingerprints, facial features, iris patterns, or voiceprints, for identification or authentication purposes.

In HR context it is used for capturing attendance: In time, out time of an employee.

Biometric systems can also be used for a variety of purposes, such as granting access to restricted areas (e.g., workplaces), verifying identities for financial transactions.